Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 99 insertions, 0 deletions

diff --git a/library/block_cipher_internal.h b/library/block_cipher_internal.h
new file mode 100644
index 00000000000..c57338b751e
--- /dev/null
+++ b/library/block_cipher_internal.h
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+/**
+ * \file block_cipher_internal.h
+ *
+ * \brief Lightweight abstraction layer for block ciphers with 128 bit blocks,
+ * for use by the GCM and CCM modules.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+#ifndef MBEDTLS_BLOCK_CIPHER_INTERNAL_H
+#define MBEDTLS_BLOCK_CIPHER_INTERNAL_H
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/cipher.h"
+
+#include "mbedtls/block_cipher.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief           Initialize the context.
+ *                  This must be the first API call before using the context.
+ *
+ * \param ctx       The context to initialize.
+ */
+static inline void mbedtls_block_cipher_init(mbedtls_block_cipher_context_t *ctx)
+{
+    memset(ctx, 0, sizeof(*ctx));
+}
+
+/**
+ * \brief           Set the block cipher to use with this context.
+ *                  This must be called after mbedtls_block_cipher_init().
+ *
+ * \param ctx       The context to set up.
+ * \param cipher_id The identifier of the cipher to use.
+ *                  This must be either AES, ARIA or Camellia.
+ *                  Warning: this is a ::mbedtls_cipher_id_t,
+ *                  not a ::mbedtls_block_cipher_id_t!
+ *
+ * \retval          \c 0 on success.
+ * \retval          #MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA if \p cipher_id was
+ *                  invalid.
+ */
+int mbedtls_block_cipher_setup(mbedtls_block_cipher_context_t *ctx,
+                               mbedtls_cipher_id_t cipher_id);
+
+/**
+ * \brief           Set the key into the context.
+ *
+ * \param ctx       The context to configure.
+ * \param key       The buffer holding the key material.
+ * \param key_bitlen    The size of the key in bits.
+ *
+ * \retval          \c 0 on success.
+ * \retval          #MBEDTLS_ERR_CIPHER_INVALID_CONTEXT if the context was not
+ *                  properly set up before calling this function.
+ * \retval          One of #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH,
+ *                  #MBEDTLS_ERR_ARIA_BAD_INPUT_DATA,
+ *                  #MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA if \p key_bitlen is
+ *                  invalid.
+ */
+int mbedtls_block_cipher_setkey(mbedtls_block_cipher_context_t *ctx,
+                                const unsigned char *key,
+                                unsigned key_bitlen);
+
+/**
+ * \brief           Encrypt one block (16 bytes) with the configured key.
+ *
+ * \param ctx       The context holding the key.
+ * \param input     The buffer holding the input block. Must be 16 bytes.
+ * \param output    The buffer to which the output block will be written.
+ *                  Must be writable and 16 bytes long.
+ *                  This must either not overlap with \p input, or be equal.
+ *
+ * \retval          \c 0 on success.
+ * \retval          #MBEDTLS_ERR_CIPHER_INVALID_CONTEXT if the context was not
+ *                  properly set up before calling this function.
+ * \retval          Another negative value if encryption failed.
+ */
+int mbedtls_block_cipher_encrypt(mbedtls_block_cipher_context_t *ctx,
+                                 const unsigned char input[16],
+                                 unsigned char output[16]);
+/**
+ * \brief           Clear the context.
+ *
+ * \param ctx       The context to clear.
+ */
+void mbedtls_block_cipher_free(mbedtls_block_cipher_context_t *ctx);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_BLOCK_CIPHER_INTERNAL_H */